electric problems

[rodney]

I know this is for trucks
but maybe someone can help ?
my girl friends dad has a astro van and half of electric stuff quit
working I have replaced all the fuses in the box and I still cant get the headlights , taillights , horn , radio, and all inside lights to work.
this is what does work heater a/c , dashlights ,powerseats,and turn signals.
Its like 1/2 the stuff works and 1/2 dont .
he said it all worked untill yesterday.
also the only bad fuse was the radio.
Is there a ground problem or other fuses hidden somewhere.